39689344 has 32 divisors (see below), whose sum is σ = 80918640. Its totient is φ = 19380480.

The previous prime is 39689303. The next prime is 39689369. The reversal of 39689344 is 44398693.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 39689294 and 39689303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1899 + ... + 9109.

Almost surely, 2^39689344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39689344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40459320).

39689344 is an abundant number, since it is smaller than the sum of its proper divisors (41229296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39689344 is an equidigital number, since it uses as much as digits as its factorization.

39689344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7268 (or 7256 counting only the distinct ones).

The product of its digits is 559872, while the sum is 46.

The square root of 39689344 is about 6299.9479362928. The cubic root of 39689344 is about 341.1075302358.

The spelling of 39689344 in words is "thirty-nine million, six hundred eighty-nine thousand, three hundred forty-four".